Refrigerating apparatus



Oct-13,1925- 1,556,708

R. G. OSBORN REFRIGERATING APPARATUS Filed Oct. 5. 1923 g a 42 as 3! 4837 48 W ///////,g( WW 84 I Qanunaaumx III III/i777 Inzrezz if? Patented Oct. 13,1925. v I UNITED STATES 1,556,708 PATENT OFFICE.

30m! G. ($830311, DAYTON, OHIO, ASSIGNOB TO DELOO-LIGQT comm, OI

' DAYTON, 0310, A CORPORATION Oil DELAWARE.

mmomrnm APPARATUS.

Application llled October 8, 1888. Serial Ion 666,848.

To all 'wlwm at my concern:

Be it known that 1, ROBERT G. OsaoRN, a citizen of the United States of Amer1ca,-residin at Da 11, county of Montgomery, and tate of hi0, have invented certain new and useful Improvements in Refrigerating Apparatus,- of which the following is a full,

clear, and exact description.

The present invention relates to refrigerating apparatus and more particularly to the control of the liquid refrigerant passing into the evaporator.

One of the obi'ects of the present invention is to contro the passage of fluid in a duct connected with a vessel, such as an evaporator, by mechanism ad ustable from the exterior of said vessel and by mechanism including a valve removable from the vessel without disassembling the same.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanging drawing, wherein a preferred form 0 embodiment of the present invention is clearly shown.

In the drawings- Fig. 1 is a fragmentary cross sectional view in a vertical plane of an evaporator provided with the present invention, and

Fig, 2- is a View showing the evaporator connected with a refrigeratlng system.

Referring to the drawing, 20 is a compressor driven by an electric motor 22. The gas to be compressed enters through pipe 23 and is expelled through a pipe 24. The compressed refrigerant passes through the condenser 25 where it is cooled in any suitable manner and liquefied and from thence it passes into the evaporator 26. The gaseous contents of the evaporator is drawn into the compressor 20 through pipe 23.

Referring more particularly to Fig. 1 the evaporator 26 comprises a header 30 having an end cover 31 attached to the header by bolts 32. The end cover 31 is provided with an inwardly extending hollow boss 33 providing a duct, the end of which is provided with a relatively small opening 34 and a valve seat 35.. A valve 36 cooperates with the valve seat 35 and has a stem 37 extend-- ing through the opening .34. The boss 33 is internallythreaded to receive a nut 38 having a screwdriver slot 39 and a passage 4Q.

A spring-42 is interposed between the back of mites and the nut 38 and normally maintains the valve 36 upon the seat 35. The hollow portion of the boss 33 extends through the op osite end of the end cover 31 and is enlarge and screw threaded to receive the coupling 43 connected with the pipe 24. Cover 31 is also provided with a ho e 44 which receives a pipe 45 and is connected in any suitable manner to the coupling 46 which in turn is connected to the pipe 23 and said pi e 45, the hole 44 formng an outlet from t e header 30.

Float lever 48is pivoted at 49 to the boss 33 and carries the float 50. Lever 48 has a downwardly projecting arm 51 which is adapted to engage the stem 37 of the valve 36 to move the valve away from the seat 35 whereby liquid refrigerant will ass through opening 34 into the header. A ter the level of the liquid refrigerant within the header 30 rises to a certain height the arm 51 of lever 48 will move out of engagement with the finger 37 permitting the valve 36 to be returned to its seat 35 through the aid of spring 42.

It will be apparent from the foregoing description that certain advantages are present in the present invention. The height of the li uid level within the header can be controlle from the exterior of'the header. By adjusting the nut 38 the spring tension on the valve 36 can be controlled whereby more or less force is necessary for opening or closing the valve, therefore the force necessary for opening the valve can be adjusted.

The present structure provides a valve which is readily removable from the exterior of the header without dismantling said header whereby the valve and valve seat may be readil repaired when not operating correctly. y merel disconnecting the coupling 43, the adjustlng nut 38, the spring 42, and valve 36 can be removed.

While the form of mechanism herein shown and described constitutes a preferred embodiment of one form of invention, it is to be understood that other forms mightbe adopted, and various changes and alterations made in the shape, size and proportion of the elements therein without departing from the spirit and scope of the invention:-

What is claimed is as'follows:

In refrigerating apparatus of'the 'class scribed, a vessel adapted to contain a liquefied refrigerating material, a boss carried by a 'wall of said vessel and extending thereinto, and having a lizaiuid sup 1y duct extending therethrough an throug which liquid is su plied to the interior of said vessel, said uct being screw threaded at its outer end, and having a valve seat at its inner end, a valve arranged within said duct and adapted to coo ate with said valve seat, a spring locate within said duct and one end of which acts upon said valve, a threaded abutment arran ed within said duct and in engagement with t e threaded portion nuqm thereof, and against which other end of said spring abuts, and afloat member located within said vessel and sipported from the 1s liquid supply conduit to be detachably con- 20 nected therewith.

In testimony. whereof I hereto aifix my ROBERT G. OSBORN.

' signature. 

